C-Nav 2050M User Manual - page 152
C-Nav2050 User Guide
above ground of the phase center must be measured
accurately to ensure accurate GPS readings. The
the
ase of
the known distance between this
al
e).
known
ect
x, calculations to achieve
f the satellite signal and based on
phase center height can be calculated by adding
height to an easily measured point, such as the b
the antenna mount, to
point and the phase center.
Phase Lock is the technique where the phase of a
signal is set to replicate the phase of a reference sign
by comparing the phase of the two signals and then
using the resultant phase difference to adjust the
reference oscillator to eliminate the difference.
Phase Measurement is measurement expressed as a
percentage of a portion of a wave (e.g. a sine wav
For example, a complete wavelength
Position is the latitude, longitude, and altitude of a
point. An estimate of error is often associated with a
position.
Position Dilution of Precision (PDOP) is a measure of
the magnitude of Dilution of Position (DOP) errors in the
x, y, and z coordinates.
Post-processing is a method of differential data
correction, which compares data logged from a
reference point to data logged by a roving receiver over
the same period of time. Variations in the position
reported by the reference station can be used to corr
the positions logged by the roving receiver. Post-
processing is performed after the user collects the data
and returns to the office, rather than in real time as data
is logged, so it can use comple
greater accuracy.
Precise code see P-code.
Precise Ephemeris is the ephemeris computed after
the transmission o
G-20